Being a female, I don't find other women all that seductive, but their music can move me emotionally. I'm not familiar with Lucinda Williams (have heard the name, but that's it), but like Bonnie Raitt, Sarah McLachlan, Suzanne Vega and Eva Cassidy.
Male singers can move me both emotionally and physically... I was listening to Jeff Healey yesterday, singing the John Hiatt song "Angel Eyes" - now that does it for me. A gorgeous voice teamed up with a singing guitar accompaniment - I'm weak at the knees!
